{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "OBJECTIVES : Recently published studies have demonstrated increased efficacy and cost - effectiveness of combination therapy with interferon and alpha - 2b / ribavirin compared with interferon - alpha monotherapy in the treatment of chronic hepatitis C ( CHC ) ."}
{"Chemical": ["ribavirin", "interferon - alpha"], "Disease": ["chronic hepatitis C", "CHC"]}